<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        input{
            border-style: none;

            border-bottom: solid 5px red;
        }
    </style>
</head>
<body>
    <form method="get"action="">
        <table>
            <tr>
                <td><label>用户名：</label></td>
                <td><input type="text"  /></td>
            </tr>
            <tr>
                <td><label>密码：</label></td>
                <td><input type="password"  /></td>
            </tr>
            <tr>
                <td></td>
                <td><input type="submit" value="登录"/></td>
            </tr>
        </table>
    </form>
</body>
</html>